[MonoDevelop] Moving to 2.0

[Lluis Sanchez]

Hi all

I just changed the compilation configuration of MD and now it is being
built with gmcs. This change is needed to be able to reuse some of the
code from SharpDevelop 2.0, and will allow us to use nice 2.0 features.

In fact, I just committed NRefactory into MD's svn and made the
necessary changes to our c# binding, so now MD can properly parse C# 2.0
source code files.

If you find any issue after this change, please let me know. We need to
do a good testing before the next release, since this is an important
change.

Enjoy,
Lluis.